### Home > PC3 > Chapter 9 > Lesson 9.2.2 > Problem 9-120

9-120.

Vectors .

If two vectors are perpendicular, their dot product is

Or, they have opposite reciprocal slopes.

Solve

9-120.

Vectors .

If two vectors are perpendicular, their dot product is

Or, they have opposite reciprocal slopes.

Solve